Measuring device



Nov. 20, 1928. 1,692,637

F. L. DUNN MEASURING DEVICE Filed March 2, 1927 Patented Nov. 20, 1928.

UNITED STATES FRANK L. DUNN, 03T MAHA, NEBRASKA.

MnAsunino ouvres.

Application filed March 2,

'lhe invention relates to measuring devices aud has tor its object toprovide a device of this character which utilizes plungers moved by aiiquid body tor moving an. object a pre- 5 dete 1mined distance. Also toprovide a screw iieed cooperating with the liquid body tor impartingmovement to the plunger-s.

A iurther object is to provide a liquid feed iter the plungerscomprising a casing l having a chamber therein in which liquid isdisposed, a threaded member extending into said chamber and adapted tobe moved inwardly and outwardly anda second threaded member threadedinto tho lirst mentioned 15 threaded member for obtaining relativelyminute movement of the iiquid body and cond sequent movement of anobject through the plungcrs. The useot a liquid and plunger system hasbeen found to reduce vibration to a minimum.

.A turthor object is to provide a measuring de ce whereby minutemovements oi' an objec-u may be obtained, and which device comprises atrame having a plurality ot graduated cylinders thereon in which objectenplungers are slidably mounted, a vertically disposed universallymounted cylin ocr having a plunger therein for supporting the object,screw threaded liquid displacing members having pipe connections withthe cy ders and forming` means tor moving iiquid bodies for impartingmovement to an otrirct` supported by the vertically disposed cylinder.

'further object is to provide leveling means 'for the device as a whole.

V-.lith the above and other objects in view the invention resides in thecombination and ioement ot part-s as hereinatter set torth, f3 own inthe drawing, described and claimed, 'at icing understood that changes inthe precise embodiment ot the invention may be made within the scope. ofwhat is claimed without departing from the spirit of the invention.

In the drawing:

Figure 1 is a view in elevation of the device.

Figure 2 is a top plan view of the device.

Figure 3 is a vertical longitudinal sectional view through one ot thefluid moving devices.

Referring to the drawing, the numeral 1 designates the base plate ot thedevice,.which plate is supported on leveling screws 2, which arethreaded at 3 through the plate and provided with iinger engaging wheels l by means ot which the leveling operation may be easily Iii .us-od asdesired.

1927. ysensi No. 17e 034.

and quickly accomplished; Extending up-y wardly trom the plate 1 arevertically disposed p es 5 which are preferably at right angles to eachother, and it is to be underthat any number of plates 5 may be Securedto the upper ends ,ne plates 5 by vmeans of clips 6 are gradtransparentcylinders 7, in which are azoly mounted plungers 8, and against hplungers liquid acts tor moving the The outer ends of the plungers 8 areded .withV heads 9 which engage an 0bject l() to be moved and the object10 is supported on a plunger 11 which extends downvcally disposedtransparent p "..vi

l to a v 12 having graduations andwhic'h indcr is unii sally supportedat 13'in a ner whereby it may tilt in any direction. i-Ythough only twocylinders 7"V are used, it is t( be understood any number desired may bel and that two are shown for purposes llustration only. The upper end ofthe transparent cylinder 12 is provided with a yoke .1 /l to which isconnected at 15 a conctablo spring 16, which spring extends `inw diy andis anchored to the post 17 .which locate a position where the cylinder12 wid be pulled inwardly towards the tilting devices at all times, butagainst which spring the tilting devices or heads 9 work.

Connected to the ends ot all of the cylinders 7 and 12 at 17 tubes 18,land which tubes have their other ends connected at 19 to liquidcylinders 20 secured to the base by means oi? clips 21. All oi theliquid cylinders 20 are ot the same construction, and for purposes otillustration one only is shown and is specifically described rlfheliquid cylinder 20 is provided with a liquid chamber 22 and the liquidentirely fills said chamber, the tubing 18 and the cylinders 7 and 12,in other words the air is entirely displaced. Threaded at 23 into theliquid cylinder 2O is an adjust-able sleeve 24 which is adapted to bemoved inwardly for forcing liquid or the body ot liquid towards thepistons 8 for imparting outward movement thereto and consequent movementof the object 10, and which object may be raised through the medium otthe cylinder 10. For finer adjustment an adjusting screw is providedwhich is threaded into the sleeve 24, and has prefer! ably liner threadthereon, therefore it will be seen that a minute microscopic movement ofthe liquid body may be obtained. Sleeve 24 and screw 25 are providedwith finger enwir lin

gaging members 26, adapted to be grasped by the operator for adjustingthe device. Finely regulated movement is obtained by using a screwplunger and a syringe the ratio of movement varying inversely as thecross sections of the screw plunger and syringe.

It has been found that liquid transmission of pressure is particularlyadapted to a fine movement because of the incompressibility of liquidsand the corresponding absence of elastic vibration at ordinarypressures. The force of compression movement is limited only by thebursting strength of the apparat-us While the suction movement islimited by the vapor pressure oi" the liquid used. In

the case of oil at a room temperature, this is low.

From the above it will be seen that a device is provided wherebyrelatively small move ments may be imparted or measurements taken, thatthe device is simple in construction, the parts reduced to a minimum andthe same can be cheaply manufactured `and sold.

The invention having been set forth what is claimed as new and usefulis 1. A device of the character described Vtomprising a frame, graduatedtransparent members carried by said frame, object engaging plungersextending into said transparent members, liquid cylinders, pipeconnections between said liquid cylinders and the transparent cylinders,the liquid entirely displacing the air within the tubes, transparentmembers and fluid cylinders and a fiuid moving screw threaded into theliquid cylinder.

2. A measuring device comprising a frame, plunger cylinders disposed atan angle to each other and carried by said frame, object enyragingplungers in said plunger cylinders, liquid cylinders, pipe connectionsbetween the liquid cylinders and the plunger cylinders, sleeves threadedinto the liquid Vcylinders and a liquid moving screw threaded intor eachof said sleeves.

3. A measuring device of the character dey scribed comprising a plate,vertically disposed members carried by said plate, plunger cylinderssupported by said members and adapted to receive liquid, movableplungersV liquid cylinders and means for supporting an object adjacentthe ends of the plungers. In testimony whereof I hereunto affix mysignature.

FRANK L. DUNiv.

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